997144634 has 4 divisors (see below), whose sum is σ = 1495716954. Its totient is φ = 498572316.

The previous prime is 997144607. The next prime is 997144637. The reversal of 997144634 is 436441799.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 534765625 + 462379009 = 23125^2 + 21503^2 .

It is a super-2 number, since 2×997144634² = 1988594842229987912, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (997144637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 249286157 + ... + 249286160.

Almost surely, 2^997144634 is an apocalyptic number.

997144634 is a deficient number, since it is larger than the sum of its proper divisors (498572320).

997144634 is a wasteful number, since it uses less digits than its factorization.

997144634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 498572319.

The product of its digits is 653184, while the sum is 47.

The square root of 997144634 is about 31577.5970270063. The cubic root of 997144634 is about 999.0473039919.

The spelling of 997144634 in words is "nine hundred ninety-seven million, one hundred forty-four thousand, six hundred thirty-four".